The improvement of memory for shapes, figures, and signs also leads to better performance in reading, spelling, and arithmetic. This workbook is based on materials designed to develop optical discrimination skills. The versatility of the representations, the wealth of ideas, and the humorous illustrations motivate children to engage with the exercises. They learn to retain experienced events and compare them with other observations. In this playful way, shape memory is trained, which in turn positively impacts performance in important school subjects. To work with this workbook, you will need the LÜK solution device.